mirror of
https://github.com/reactos/reactos.git
synced 2024-08-27 13:48:42 +00:00
286 lines
7.1 KiB
C
286 lines
7.1 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* PURPOSE: Functions for creation and destruction of DCs
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* FILE: subsystem/win32/win32k/objects/dcattr.c
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* PROGRAMER: Timo Kreuzer (timo.kreuzer@rectos.org)
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*/
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#include <w32k.h>
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#define NDEBUG
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#include <debug.h>
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#define GDIDCATTRFREE 8
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typedef struct _GDI_DC_ATTR_FREELIST
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{
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LIST_ENTRY Entry;
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DWORD nEntries;
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PVOID AttrList[GDIDCATTRFREE];
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} GDI_DC_ATTR_FREELIST, *PGDI_DC_ATTR_FREELIST;
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typedef struct _GDI_DC_ATTR_ENTRY
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{
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DC_ATTR Attr[GDIDCATTRFREE];
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} GDI_DC_ATTR_ENTRY, *PGDI_DC_ATTR_ENTRY;
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PDC_ATTR
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FASTCALL
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AllocateDcAttr(VOID)
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{
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PTHREADINFO pti;
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PPROCESSINFO ppi;
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PDC_ATTR pDc_Attr;
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PGDI_DC_ATTR_FREELIST pGdiDcAttrFreeList;
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PGDI_DC_ATTR_ENTRY pGdiDcAttrEntry;
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int i;
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pti = PsGetCurrentThreadWin32Thread();
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if (pti->pgdiDcattr)
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{
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pDc_Attr = pti->pgdiDcattr; // Get the free one.
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pti->pgdiDcattr = NULL;
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return pDc_Attr;
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}
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ppi = PsGetCurrentProcessWin32Process();
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if (!ppi->pDCAttrList) // If set point is null, allocate new group.
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{
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pGdiDcAttrEntry = EngAllocUserMem(sizeof(GDI_DC_ATTR_ENTRY), 0);
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if (!pGdiDcAttrEntry)
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{
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DPRINT1("DcAttr Failed User Allocation!\n");
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return NULL;
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}
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DPRINT("AllocDcAttr User 0x%x\n",pGdiDcAttrEntry);
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pGdiDcAttrFreeList = ExAllocatePoolWithTag( PagedPool,
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sizeof(GDI_DC_ATTR_FREELIST),
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GDITAG_DC_FREELIST);
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if ( !pGdiDcAttrFreeList )
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{
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EngFreeUserMem(pGdiDcAttrEntry);
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return NULL;
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}
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RtlZeroMemory(pGdiDcAttrFreeList, sizeof(GDI_DC_ATTR_FREELIST));
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DPRINT("AllocDcAttr Ex 0x%x\n",pGdiDcAttrFreeList);
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InsertHeadList( &ppi->GDIDcAttrFreeList, &pGdiDcAttrFreeList->Entry);
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pGdiDcAttrFreeList->nEntries = GDIDCATTRFREE;
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// Start at the bottom up and set end of free list point.
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ppi->pDCAttrList = &pGdiDcAttrEntry->Attr[GDIDCATTRFREE-1];
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// Build the free attr list.
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for ( i = 0; i < GDIDCATTRFREE; i++)
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{
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pGdiDcAttrFreeList->AttrList[i] = &pGdiDcAttrEntry->Attr[i];
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}
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}
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pDc_Attr = ppi->pDCAttrList;
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pGdiDcAttrFreeList = (PGDI_DC_ATTR_FREELIST)ppi->GDIDcAttrFreeList.Flink;
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// Free the list when it is full!
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if ( pGdiDcAttrFreeList->nEntries-- == 1)
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{ // No more free entries, so yank the list.
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RemoveEntryList( &pGdiDcAttrFreeList->Entry );
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ExFreePoolWithTag( pGdiDcAttrFreeList, GDITAG_DC_FREELIST );
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if ( IsListEmpty( &ppi->GDIDcAttrFreeList ) )
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{
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ppi->pDCAttrList = NULL;
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return pDc_Attr;
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}
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pGdiDcAttrFreeList = (PGDI_DC_ATTR_FREELIST)ppi->GDIDcAttrFreeList.Flink;
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}
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ppi->pDCAttrList = pGdiDcAttrFreeList->AttrList[pGdiDcAttrFreeList->nEntries-1];
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return pDc_Attr;
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}
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VOID
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FASTCALL
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FreeDcAttr(PDC_ATTR pDc_Attr)
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{
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PTHREADINFO pti;
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PPROCESSINFO ppi;
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PGDI_DC_ATTR_FREELIST pGdiDcAttrFreeList;
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pti = PsGetCurrentThreadWin32Thread();
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if (!pti) return;
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if (!pti->pgdiDcattr)
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{ // If it is null, just cache it for the next time.
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pti->pgdiDcattr = pDc_Attr;
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return;
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}
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ppi = PsGetCurrentProcessWin32Process();
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pGdiDcAttrFreeList = (PGDI_DC_ATTR_FREELIST)ppi->GDIDcAttrFreeList.Flink;
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// We add to the list of free entries, so this will grows!
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if ( IsListEmpty(&ppi->GDIDcAttrFreeList) ||
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pGdiDcAttrFreeList->nEntries == GDIDCATTRFREE )
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{
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pGdiDcAttrFreeList = ExAllocatePoolWithTag( PagedPool,
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sizeof(GDI_DC_ATTR_FREELIST),
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GDITAG_DC_FREELIST);
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if ( !pGdiDcAttrFreeList )
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{
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return;
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}
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InsertHeadList( &ppi->GDIDcAttrFreeList, &pGdiDcAttrFreeList->Entry);
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pGdiDcAttrFreeList->nEntries = 0;
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}
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// Up count, save the entry and set end of free list point.
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++pGdiDcAttrFreeList->nEntries; // Top Down...
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pGdiDcAttrFreeList->AttrList[pGdiDcAttrFreeList->nEntries-1] = pDc_Attr;
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ppi->pDCAttrList = pDc_Attr;
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return;
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}
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BOOL
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FASTCALL
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DC_AllocDcAttr(PDC pdc)
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{
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DC_AllocateDcAttr(pdc->BaseObject.hHmgr);
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*pdc->pdcattr = pdc->dcattr;
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return TRUE;
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}
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// CHECK against current head
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VOID
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FASTCALL
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DC_AllocateDcAttr(HDC hDC)
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{
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PVOID NewMem = NULL;
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PDC pDC;
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HANDLE Pid = NtCurrentProcess();
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ULONG MemSize = sizeof(DC_ATTR); //PAGE_SIZE it will allocate that size
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NTSTATUS Status = ZwAllocateVirtualMemory(Pid,
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&NewMem,
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0,
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&MemSize,
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MEM_COMMIT|MEM_RESERVE,
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PAGE_READWRITE);
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{
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INT Index = GDI_HANDLE_GET_INDEX((HGDIOBJ)hDC);
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PGDI_TABLE_ENTRY Entry = &GdiHandleTable->Entries[Index];
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// FIXME: dc could have been deleted!!! use GDIOBJ_InsertUserData
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if (NT_SUCCESS(Status))
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{
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RtlZeroMemory(NewMem, MemSize);
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Entry->UserData = NewMem;
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DPRINT("DC_ATTR allocated! 0x%x\n",NewMem);
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}
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else
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{
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DPRINT("DC_ATTR not allocated!\n");
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}
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}
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pDC = DC_LockDc(hDC);
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ASSERT(pDC->pdcattr == &pDC->dcattr);
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if(NewMem)
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{
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pDC->pdcattr = NewMem; // Store pointer
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}
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DC_UnlockDc(pDC);
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}
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VOID
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NTAPI
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DC_vFreeDcAttr(PDC pdc)
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{
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HANDLE Pid = NtCurrentProcess();
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INT Index;
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PGDI_TABLE_ENTRY pent;
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if (pdc->pdcattr == &pdc->dcattr)
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{
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// Internal DC object!
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return;
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}
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pdc->pdcattr = &pdc->dcattr;
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Index = GDI_HANDLE_GET_INDEX(pdc->BaseObject.hHmgr);
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pent = &GdiHandleTable->Entries[Index];
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if(pent->UserData)
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{
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ULONG MemSize = sizeof(DC_ATTR);
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NTSTATUS Status = ZwFreeVirtualMemory(Pid,
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&pent->UserData,
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&MemSize,
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MEM_RELEASE);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("DC_FreeDC failed to free DC_ATTR 0x%p\n", pent->UserData);
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ASSERT(FALSE);
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}
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pent->UserData = NULL;
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}
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}
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static
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VOID
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CopytoUserDcAttr(PDC dc, PDC_ATTR pdcattr)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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dc->dcattr.mxWorldToDevice = dc->dclevel.mxWorldToDevice;
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dc->dcattr.mxDeviceToWorld = dc->dclevel.mxDeviceToWorld;
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dc->dcattr.mxWorldToPage = dc->dclevel.mxWorldToPage;
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_SEH2_TRY
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{
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ProbeForWrite(pdcattr, sizeof(DC_ATTR), 1);
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RtlCopyMemory(pdcattr, &dc->dcattr, sizeof(DC_ATTR));
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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Status = _SEH2_GetExceptionCode();
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ASSERT(FALSE);
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}
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_SEH2_END;
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}
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// FIXME: wtf? 2 functions, where one has a typo in the name????
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BOOL
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FASTCALL
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DCU_SyncDcAttrtoUser(PDC dc)
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{
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PDC_ATTR pdcattr = dc->pdcattr;
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if (pdcattr == &dc->dcattr) return TRUE; // No need to copy self.
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ASSERT(pdcattr);
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CopytoUserDcAttr( dc, pdcattr);
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return TRUE;
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}
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// LOL! DCU_ Sync hDc Attr to User,,, need it speeled out for you?
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BOOL
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FASTCALL
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DCU_SynchDcAttrtoUser(HDC hDC)
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{
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BOOL Ret;
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PDC pDC = DC_LockDc ( hDC );
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if (!pDC) return FALSE;
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Ret = DCU_SyncDcAttrtoUser(pDC);
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DC_UnlockDc( pDC );
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return Ret;
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}
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